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數學的語言是普遍的，超越了文化和語言的障礙。

The greatest threat to our forests isn't logging—it's indifference.

Not everything that is faced can be changed, but nothing can be changed until it is faced.

Liberty is the right of doing whatever laws permit.

我不害怕做自己。

旅行對偏見、固執和狹隘是致命的。

鬧市是賺錢的地方，安靜的地方才能休養身體。